Problem Symptoms And Measures - Daikin FTK25JVE9 Service Manual

Si04-115

2. Problem Symptoms and Measures

Problem Symptom
None of The Units
Operates.
Operation Sometimes
Stops.
Some indoor units do not
operate.
Equipment operates but
does not cool, or does not
heat (only for heat pump
model).
Large Operating Noise and
Vibrations
Service Diagnosis
Check Item
Check the power supply.
Check the type of the indoor units.
Check the outside air temperature.
Check the remote controller
addresses.
Check the power supply.
Check the outside air temperature.
Check the type of the indoor units.
Check for thermistor detection errors. Check to make sure that the main unit's
Diagnosis by service port pressure
and operating current
Check the output voltage of the
power transistor.
Check the power transistor.
Check the installation condition.

Problem Symptoms and Measures

Details of Measure
Check to make sure that the rated voltage is
supplied.
Check to make sure that the indoor unit type is
compatible with the outdoor unit.
Heating operation cannot be used when the
outside temperature is 30°C or higher (only for
heat pump model), and cooling operation
cannot be used when the outside temperature
is below 0 °C.
Check to make sure that address settings for
the remote controller and indoor unit are
correct.
A power failure of 2 to 10 cycles can stop air
conditioner operation. (Operation lamp OFF)
Heating operation cannot be used when the
outside temperature is 30°C or higher (only for
feat pump model), and cooling operation cannot
be used when the outside temperature is below
0°C.
Check to make sure that the indoor unit type is
compatible with the outdoor unit.
thermistor has not dismounted from the pipe
holder.
Check for insufficient gas.
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Check to make sure that the required spaces
for installation (specified in the Technical
Guide, etc.) are provided.
Page
No. to
be
referred
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91
87
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63